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Manholes in Calgary

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Manholes are access points to Calgary's water and wastewater system. On the water side, they allow access to valve chambers for maintenance and repairs. On the wastewater side, they provide access to pipes to allow us to clean and maintain wastewater and stormwater infrastructure. Calgary's manholes are 21 inches (53.340 centimetres) in diameter, and are maintained and managed by Water Services.

Important: Do not ever attempt to open a manhole cover or enter a manhole. If you find an unattended manhole that is open, please contact 311 immediately.

Report a manhole issue

If you are experiencing any of the following issues with a manhole, please contact 311 or complete the online 311 request below.

Report a high or low manhole

Calgary's manhole art

Did you know: Most manhole covers are round to prevent them from accidently slipping down their holes and into the sewer system.

Did you know: A manhole cover is also called "a biscuit"

The Chinook manhole covers were a joint project between Infrastructure and Public Art, blending the utilitarian with the artistic. Garry Williams, a Calgary-based artist, created these covers to evoke the wind and chinooks that are part of our culture and climate.